[BUG]反序列化Builder类错误

[prog-ape]

问题描述

User类是第三方jar里的，存入redis，反序列化时出现下面异常

环境信息

请填写以下信息：

• OS信息： windows 11 64G
• JDK信息： jdk 17
• 版本信息：2.0.48

重现步骤

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import lombok.NonNull;


@JsonDeserialize(
        builder = UserBuilderImpl.class
)
public class User implements ApiObject {
    private static final String ID_FIELD = "id";
    private static final String FIRST_NAME_FIELD = "first_name";
    @JsonProperty("id")
    private @NonNull Long id;
    @JsonProperty("first_name")
    private @NonNull String firstName;

    protected User(User.UserBuilder<?, ?> b) {
        this.id = b.id;
        if (this.id == null) {
            throw new NullPointerException("id is marked non-null but is null");
        } else {
            this.firstName = b.firstName;
            if (this.firstName == null) {
                throw new NullPointerException("firstName is marked non-null but is null");
            }
        }
    }

    public static User.UserBuilder<?, ?> builder() {
        return new User.UserBuilderImpl();
    }

    public boolean equals(Object o) {
        if (o == this) {
            return true;
        } else if (!(o instanceof User)) {
            return false;
        } else {
            User other = (User)o;
            if (!other.canEqual(this)) {
                return false;
            } else {
                label143: {
                    Object this$id = this.getId();
                    Object other$id = other.getId();
                    if (this$id == null) {
                        if (other$id == null) {
                            break label143;
                        }
                    } else if (this$id.equals(other$id)) {
                        break label143;
                    }

                    return false;
                }

                label94: {
                    Object this$firstName = this.getFirstName();
                    Object other$firstName = other.getFirstName();
                    if (this$firstName == null) {
                        if (other$firstName == null) {
                            break label94;
                        }
                    } else if (this$firstName.equals(other$firstName)) {
                        break label94;
                    }

                    return false;
                }
                return true;
            }
        }
    }

    protected boolean canEqual(Object other) {
        return other instanceof User;
    }

    public int hashCode() {
        int PRIME = true;
        int result = 1;
        Object $id = this.getId();
        result = result * 59 + ($id == null ? 43 : $id.hashCode());
        Object $firstName = this.getFirstName();
        result = result * 59 + ($firstName == null ? 43 : $firstName.hashCode());
        return result;
    }

    public @NonNull Long getId() {
        return this.id;
    }

    public @NonNull String getFirstName() {
        return this.firstName;
    }


    @JsonProperty("id")
    public void setId(@NonNull Long id) {
        if (id == null) {
            throw new NullPointerException("id is marked non-null but is null");
        } else {
            this.id = id;
        }
    }

    @JsonProperty("first_name")
    public void setFirstName(@NonNull String firstName) {
        if (firstName == null) {
            throw new NullPointerException("firstName is marked non-null but is null");
        } else {
            this.firstName = firstName;
        }
    }

    public String toString() {
        Long var10000 = this.getId();
        return "User(id=" + var10000 + ", firstName=" + this.getFirstName()  + ")";
    }

    public User(@NonNull Long id, @NonNull String firstName) {
        if (id == null) {
            throw new NullPointerException("id is marked non-null but is null");
        } else if (firstName == null) {
            throw new NullPointerException("firstName is marked non-null but is null");
        }
    }

    public abstract static class UserBuilder<C extends User, B extends User.UserBuilder<C, B>> {
        private Long id;
        private String firstName;

        public UserBuilder() {
        }

        @JsonProperty("id")
        public B id(@NonNull Long id) {
            if (id == null) {
                throw new NullPointerException("id is marked non-null but is null");
            } else {
                this.id = id;
                return this.self();
            }
        }

        @JsonProperty("first_name")
        public B firstName(@NonNull String firstName) {
            if (firstName == null) {
                throw new NullPointerException("firstName is marked non-null but is null");
            } else {
                this.firstName = firstName;
                return this.self();
            }
        }


        protected abstract B self();

        public abstract C build();

        public String toString() {
            return "User.UserBuilder(id=" + this.id + ", firstName=" + this.firstName + ")";
        }
    }

    @JsonPOJOBuilder(
            withPrefix = "",
            buildMethodName = "build"
    )
    static final class UserBuilderImpl extends User.UserBuilder<User, User.UserBuilderImpl> {
        private UserBuilderImpl() {
        }

        protected User.UserBuilderImpl self() {
            return this;
        }

        public User build() {
            return new User(this);
        }
    }
}


import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import java.io.Serializable;

@JsonIgnoreProperties(
    ignoreUnknown = true
)
@JsonInclude(Include.NON_NULL)
public interface ApiObject extends Serializable {
}


public class FastJsonCodec extends BaseCodec {
    static final Filter autoTypeFilter = JSONReader.autoTypeFilter(
            "com.test"
    );

    private final Encoder encoder = in -> {
        ByteBuf out = ByteBufAllocator.DEFAULT.buffer();
        try {
            ByteBufOutputStream os = new ByteBufOutputStream(out);
            JSON.writeTo(os, in, JSONWriter.Feature.WriteClassName);
            return os.buffer();
        } catch (Exception e) {
            out.release();
            throw new IOException(e);
        }
    };

    private final Decoder<Object> decoder = (buf, state) ->
            JSON.parseObject(new ByteBufInputStream(buf).readAllBytes(), Object.class, autoTypeFilter);

    @Override
    public Decoder<Object> getValueDecoder() {
        return decoder;
    }

    @Override
    public Encoder getValueEncoder() {
        return encoder;
    }
}

1. 使用 xxx.xxx 方法
2. 输入 ... 数据
3. 出现 ... 错误

示例代码
RedisUtils.set("xxxx",user);

User caUser=RedisUtils.get("xxxx");


### 相关日志输出
Caused by: com.alibaba.fastjson2.JSONException: invoke constructor error, public com.test.objects.User(java.lang.Long,java.lang.String)
	at com.alibaba.fastjson2.reader.ConstructorFunction.apply(ConstructorFunction.java:222)
	at com.alibaba.fastjson2.reader.ConstructorFunction.apply(ConstructorFunction.java:15)
	at com.alibaba.fastjson2.reader.ObjectReaderNoneDefaultConstructor.readObject(ObjectReaderNoneDefaultConstructor.java:344)
	at com.alibaba.fastjson2.reader.ObjectReaderImplObject.readObject(ObjectReaderImplObject.java:129)
	at com.alibaba.fastjson2.JSON.parseObject(JSON.java:1463)
	at com.test.config.FastJsonCodec.lambda$new$1(FastJsonCodec.java:46)
	at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:433)
	at org.redisson.client.handler.CommandDecoder.decodeCommand(CommandDecoder.java:216)
	at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:144)
	at org.redisson.client.handler.CommandDecoder.decode(CommandDecoder.java:120)
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
	at io.netty.handler.codec.ReplayingDecoder.callDecode(ReplayingDecoder.java:366)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	... 1 more
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
	at com.alibaba.fastjson2.reader.ConstructorFunction.apply(ConstructorFunction.java:219)
	... 28 more
Caused by: java.lang.NullPointerException: firstName is marked non-null but is null
	at com.test.objects.User.<init>(User.java:25)
	... 34 more

[wenshao]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.49-SNAPSHOT/
问题已经修复，请帮忙用2.0.49-SNAPSHOT版本验证，2.0.49版本预计在4月底发布

[prog-ape]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.49-SNAPSHOT/ 问题已经修复，请帮忙用2.0.49-SNAPSHOT版本验证，2.0.49版本预计在4月底发布

感谢，可以了

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.49
请用新版本